added primetext functionality to sample.py
added primetext functionality to sample.py

hpssjellis/char-rnn-tensorflow-music-3dprinting,camstark/yyc-street-names,memo/char-rnn-tensorflow,hpssjellis/char-rnn-tensorflow-music-3dprinting,camstark/yyc-street-names,Zmiecer/compound-rnn,hpssjellis/char-rnn-tensorflow-music-3dprinting,sherjilozair/char-rnn-tensorflow,hpssjellis/char-rnn-tensorflow-music-3dprinting,ubergarm/char-rnn-tensorflow